Mechanical arm telescopic device

Abstract

The utility model discloses a mechanical arm telescopic device which comprises a power box, the upper side of the power box is fixedly connected with an oil cylinder, the inner wall of the oil cylinder is provided with a telescopic rod, one end of the telescopic rod is fixedly connected with a clamping hand, and the upper side of the telescopic rod is fixedly connected with a linkage rod. According to the mechanical arm, the empty groove block, the locking block, the locking block and the stress block are arranged, the position between the locking block and the stress block in the empty groove block is adjusted, when the locking block and the stress block make contact and are pressed tightly, locking of the guide block and the telescopic rod is achieved, the mechanical arm can be kept at the specific stretching length for operation, and the mechanical arm is convenient to use. When the mechanical arm stretches every time, the clamping hand of the mechanical arm can accurately stop at the preset maximum stretching position, the situation that the telescopic rod excessively stretches out due to factors such as oil pressure fluctuation and external force interference is avoided, then the positioning precision of operation is guaranteed, and the success rate of work such as assembling and the product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of telescopic structure technology for robotic arms, specifically a telescopic device for a robotic arm. Background Technology

[0002] A robotic arm telescopic device is a mechanical structural component that enables a robotic arm to change its length within a certain range to complete tasks such as grasping, handling, and operating at different distances. It typically uses a cylinder or a hydraulic cylinder as its power source.

[0003] A search revealed Chinese patent application CN202020943456.2, which discloses a double-stroke telescopic robotic arm device, comprising: a fixed arm, including a hydraulic cylinder; the outer wall of the hydraulic cylinder is provided with reinforcing ribs and a first motion guide groove; a telescopic arm, including an arm body; the inner wall of the arm body is provided with a guide rail, and the outer wall is provided with a drive rack and a second motion guide groove; wherein, the arm body is fixedly connected to the piston rod of the hydraulic cylinder; the arm body is movably mounted on the first motion guide groove via the guide rail; a gripper mounting base, including a mounting base body and a drive gear; the mounting base body is movably mounted on the second motion guide groove; the drive gear meshes with the drive rack to form a gear and rack transmission structure, used to realize the movement of the gripper mounting base on the arm body along the second motion guide groove. This invention provides a large displacement, a compact structure, and good load-bearing capacity.

[0004] Regarding the aforementioned technologies, the inventors discovered the following drawbacks: In actual use, fluctuations in oil pressure and oil flow during hydraulic cylinder operation can cause the cylinder extension length to exceed the preset limit, affecting the positioning accuracy of the robotic arm. Therefore, it is essential to design a highly practical robotic arm extension device with limiting functions. Utility Model Content

[0005] The purpose of this invention is to provide a telescopic device for a robotic arm to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a telescopic device for a robotic arm, including a power box, a hydraulic cylinder fixedly connected to the upper side of the power box, a telescopic rod provided on the inner wall of the hydraulic cylinder, a gripper fixedly connected to one end of the telescopic rod, a linkage rod fixedly connected to the upper side of the telescopic rod, a guide block fixedly connected to the upper end of the linkage rod, a plurality of support plates fixedly connected to the upper side of the power box, a limit block fixedly connected to the upper side of the plurality of support plates, and a limit opening that cooperates with the guide block on the upper side of the limit block;

[0007] A slotted block is fixedly connected to the upper side of the limiting block. A threaded rod is rotatably fitted to the inner wall of the slotted block. A locking block that slides with the slotted block is threaded onto the threaded rod. A force-bearing block that cooperates with the locking block is fixedly connected to the upper side of the guide block. A buffer assembly is provided on the upper side of the locking block.

[0008] According to the above technical solution, the buffer assembly includes a buffer box fixedly connected to the upper side of the locking block, a damper fixedly connected to one side of the inner wall of the buffer box, a buffer spring sleeved on the damper, and a buffer block fixedly connected to one end of the damper and slidingly engaged with the buffer box.

[0009] According to the above technical solution, a measuring ruler is fixedly connected to the upper side of the guide block, and the measuring ruler cooperates with the locking block.

[0010] According to the above technical solution, an opening is provided on the upper side of the inner wall of the buffer box, a sliding block that cooperates with the opening is fixedly connected to the upper side of the buffer block, and a push-type counter that cooperates with the sliding block is fixedly connected to the upper side of the buffer box.

[0011] According to the above technical solution, a drive motor is fixedly connected to one end of the empty slot block, and the output end of the drive motor extends to the inner wall of the empty slot block and is fixed to one end of the threaded rod.

[0012] According to the above technical solution, multiple guide wheels are rotatably fitted on both sides of the inner wall of the limiting port, and the multiple guide wheels are in contact with the guide block.

[0013] According to the above technical solution, a guide opening is provided on one side of the guide block, and a guide plate that cooperates with the guide opening is fixedly connected to the inner wall of the limiting opening.

[0014] 1. This utility model, by setting up a slotted block, a locking block, a locking block, and a force-bearing block, achieves locking of the guide block and the telescopic rod by adjusting the position between the locking block and the force-bearing block inside the slotted block. When the locking block contacts and presses against the force-bearing block, the guide block and the telescopic rod are locked, allowing the robotic arm to operate at a specific extension length. This ensures that each time the robotic arm extends, its gripper can accurately stop at the preset maximum extension position, avoiding excessive extension of the telescopic rod due to factors such as oil pressure fluctuations and external interference. This ensures the positioning accuracy of the operation, improves the success rate of assembly and other work, and enhances product quality.

[0015] 2. This utility model, by incorporating a buffer assembly, a movable opening, a sliding block, and a push-button counter, ensures that during use, before the force-bearing block and locking block are pressed together, the buffer block first contacts the locking block. By compressing the damper and buffer spring, the instantaneous impact force is effectively buffered, preventing damage to the overall structure of the device. Furthermore, during buffering, the buffer block drives the sliding block to press against the push-button counter within the movable opening, thus recording the number of times the buffer block moves. This allows operators to indirectly understand the frequency of locking operations, facilitating monitoring and maintenance of the device. It also helps analyze the device's operating status, promptly identify potential problems, and ensure continuous and efficient operation. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the limiting block of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the hollow slot block of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the buffer box structure of this utility model;

[0021] In the diagram: 1. Power box; 2. Hydraulic cylinder; 3. Telescopic rod; 4. Clamping hand; 5. Linkage rod; 6. Guide block; 7. Support plate; 8. Limit block; 9. Limit port; 10. Empty slot block; 11. Threaded rod; 12. Locking block; 13. Force-bearing block; 14. Buffer assembly; 141. Buffer box; 142. Damper; 143. Buffer spring; 144. Buffer block; 15. Measuring ruler; 16. Movable port; 17. Sliding block; 18. Press-type counter; 19. Drive motor; 20. Guide wheel; 21. Guide port; 22. Guide plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 The present invention provides a technical solution: a telescopic device for a robotic arm, including a power box 1, a hydraulic cylinder 2 fixedly connected to the upper side of the power box 1, a telescopic rod 3 provided on the inner wall of the hydraulic cylinder 2, a gripper 4 fixedly connected to one end of the telescopic rod 3, a linkage rod 5 fixedly connected to the upper side of the telescopic rod 3, a guide block 6 fixedly connected to the upper end of the linkage rod 5, a plurality of support plates 7 fixedly connected to the upper side of the power box 1, a limit block 8 fixedly connected to the upper side of the plurality of support plates 7, and a limit opening 9 that cooperates with the guide block 6 on the upper side of the limit block 8;

[0024] A slotted block 10 is fixedly connected to the upper side of the limiting block 8. A threaded rod 11 is rotatably fitted to the inner wall of the slotted block 10. A locking block 12 that slides with the slotted block 10 is threaded onto the threaded rod 11. A force-bearing block 13 that cooperates with the locking block 12 is fixedly connected to the upper side of the guide block 6. A buffer assembly 14 is provided on the upper side of the locking block 12.

[0025] Please see Figure 4 The buffer assembly 14 includes a buffer box 141 fixedly connected to the upper side of the locking block 12, a damper 142 fixedly connected to one side of the inner wall of the buffer box 141, a buffer spring 143 sleeved on the damper 142, and a buffer block 144 fixedly connected to one end of the damper 142 and slidingly engaged with the buffer box 141. During use, before the force block 13 and the locking block 12 are squeezed, the buffer block 144 will first come into contact. By squeezing the damper 142 and the buffer spring 143, the instantaneous impact force can be effectively buffered, avoiding damage to the overall structure of the device caused by the impact force, and also preventing loosening or displacement of components caused by the impact.

[0026] Please see Figure 1 A measuring ruler 15 is fixedly connected to the upper side of the guide block 6. The measuring ruler 15 cooperates with the locking block 12. When the locking block 12 is moved, the operator can know the distance between the locking block 12 and the force block 13 by comparing the locking block 12 and the measuring ruler 15, thereby adjusting the longest extension length of the telescopic rod 3.

[0027] Please see Figure 3 The upper side of the inner wall of the buffer box 141 is provided with a movable opening 16. The upper side of the buffer block 144 is fixedly connected with a sliding block 17 that cooperates with the movable opening 16. The upper side of the buffer box 141 is fixedly connected with a push-type counter 18 that cooperates with the sliding block 17. By counting, the number of times the buffer block 144 moves can be recorded. The operator can indirectly understand the frequency of locking operations and other information, which is convenient for monitoring and maintaining the use of the device. It also helps to analyze the working status of the device, discover potential problems in time, and ensure that the device can operate continuously and efficiently.

[0028] Please see Figure 3 One end of the empty slot block 10 is fixedly connected to a drive motor 19. The output end of the drive motor 19 extends to the inner wall of the empty slot block 10 and is fixed to one end of the threaded rod 11. The threaded rod 11 can be easily driven by the drive motor 19. The drive motor 19 can be a self-locking motor commonly available on the market.

[0029] Please see Figure 1 Multiple guide wheels 20 are rotatably fitted on both sides of the inner wall of the limiting port 9. The multiple guide wheels 20 are in contact with the guide block 6. The multiple guide wheels 20 are rotatably fitted on both sides of the inner wall of the limiting port 9. The multiple guide wheels 20 are in contact with the guide block 6. This can reduce the friction of the guide block 6 when it moves and can restrict both sides.

[0030] Please see Figure 2 A guide opening 21 is provided on one side of the guide block 6. A guide plate 22 that cooperates with the guide opening 21 is fixedly connected to the inner wall of the limiting opening 9. When the guide block 6 moves with the telescopic rod 3, the guide opening 21 will slide on the outside of the guide plate 22, thereby further guiding the guide block 6 and improving the stability of the movement.

[0031] The implementation principle of this application is as follows: When using this device, the power box 1 can serve as the basic support structure of the entire device and provide power to the cylinder 2. Under the action of the hydraulic pressure generated by the hydraulic oil flowing into the cylinder 2, the telescopic rod 3 inside the cylinder 2 can move along the inner wall of the cylinder 2. Since one end of the telescopic rod 3 is fixedly connected to the gripper 4, the telescopic rod 3 will cause the gripper 4 to move closer to or further away from the power box 1, thereby realizing the extension and retraction of the robotic arm in space to meet the needs of grasping, handling and other operations at different distances.

[0032] While the telescopic rod 3 is telescopically extending and retracting, the linkage rod 5 fixedly connected to its upper side will move along with it. The upper end of the linkage rod 5 is fixedly connected to the guide block 6. Thus, the linkage rod 5 transmits the telescopical movement of the telescopic rod 3 to the guide block 6, causing the guide block 6 to also undergo corresponding displacement changes. During the movement of the guide block 6, it will drive the force-bearing block 13 to move to a certain extent.

[0033] The threaded rod 11 rotates, and when the threaded rod 11 rotates, the locking block 12 slides linearly along the inner wall of the slot block 10, thereby bringing the locking block 12 closer to the force block 13 fixedly connected to the upper side of the guide block 6. This adjusts the position between the locking block 12 and the force block 13. When the locking block 12 contacts and presses against the force block 13, the guide block 6 is locked, thus restricting the movement of the guide block 6 and fixing the position of the telescopic rod 3. This allows the robotic arm to operate at a specific extension length, ensuring that the gripper 4 can accurately stop at the preset maximum extension position each time the robotic arm extends. This avoids the telescopic rod 3 from overextending due to factors such as oil pressure fluctuations and external interference, thereby ensuring the positioning accuracy of the operation and improving the success rate of assembly and other work and product quality.

[0034] During use, before the force-bearing block 13 and the locking block 12 are pressed together, the buffer block 144 will first come into contact. By pressing the damper 142 and the buffer spring 143, the instantaneous impact force can be effectively buffered, avoiding damage to the overall structure of the device. It also prevents parts from loosening or shifting due to the impact, further maintaining the stability of the robotic arm during operation. During buffering, the buffer block 144 can drive the sliding block 17 to press between the movable port 16 and the push-type counter 18 to achieve counting. The number of times the buffer block 144 moves can be recorded, allowing operators to indirectly understand the frequency of locking operations and other information. This facilitates the monitoring and maintenance of the device, and also helps to analyze the working status of the device, promptly identify potential problems, and ensure the continuous and efficient operation of the device.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical arm telescopic device comprising a power box (1), characterized in that: A hydraulic cylinder (2) is fixedly connected to the upper side of the power box (1). A telescopic rod (3) is provided on the inner wall of the hydraulic cylinder (2). A clamping hand (4) is fixedly connected to one end of the telescopic rod (3). A linkage rod (5) is fixedly connected to the upper side of the telescopic rod (3). A guide block (6) is fixedly connected to the upper end of the linkage rod (5). A plurality of support plates (7) are fixedly connected to the upper side of the power box (1). A limit block (8) is fixedly connected to the upper side of the plurality of support plates (7). A limit opening (9) that cooperates with the guide block (6) is provided on the upper side of the limit block (8). The upper side of the limiting block (8) is fixedly connected to a slotted block (10), and the inner wall of the slotted block (10) is rotatably fitted with a threaded rod (11). The threaded rod (11) is threadedly fitted with a locking block (12) that slides with the slotted block (10). The upper side of the guide block (6) is fixedly connected to a force-bearing block (13) that cooperates with the locking block (12). The upper side of the locking block (12) is provided with a buffer assembly (14).

2. A mechanical arm telescopic device according to claim 1, characterized in that: The buffer assembly (14) includes a buffer box (141) fixedly connected to the upper side of the locking block (12), a damper (142) fixedly connected to one side of the inner wall of the buffer box (141), a buffer spring (143) sleeved on the damper (142), and a buffer block (144) fixedly connected to one end of the damper (142) and slidingly engaged with the buffer box (141).

3. The mechanical arm telescoping device of claim 1, wherein: A measuring ruler (15) is fixedly connected to the upper side of the guide block (6), and the measuring ruler (15) cooperates with the locking block (12).

4. The mechanical arm telescoping device of claim 2, wherein: The upper side of the inner wall of the buffer box (141) is provided with a movable opening (16), the upper side of the buffer block (144) is fixedly connected with a sliding block (17) that cooperates with the movable opening (16), and the upper side of the buffer box (141) is fixedly connected with a push-type counter (18) that cooperates with the sliding block (17).

5. The mechanical arm telescoping device of claim 1, wherein: One end of the empty slot block (10) is fixedly connected to a drive motor (19), and the output end of the drive motor (19) extends to the inner wall of the empty slot block (10) and is fixed to one end of the threaded rod (11).

6. The mechanical arm telescoping device of claim 1, wherein: The inner walls of the limiting port (9) are fitted with multiple guide wheels (20) on both sides, and the multiple guide wheels (20) are in contact with the guide block (6).

7. The mechanical arm telescoping device of claim 1, wherein: The guide block (6) has a guide opening (21) on one side, and the inner wall of the limiting opening (9) is fixedly connected to a guide plate (22) that cooperates with the guide opening (21).

Images